Thebiggestbuyerandselleristhegovernment, whichconsistsoftwoimportantparts, a centralgovernmentthatcollectstaxesandspendsmoney, and a centralbank, whichisdifferentfromotherbuyersandsellersbecauseitcontrolstheamountofmoneyandcreditintheeconomy.
Lendersusuallywanttomaketheirmoneyintomoremoney, andborrowersusuallywanttobuysomethingtheycan't afford, like a houseor a car, ortheywanttoinvestinsomethinglikestarting a business.